To Prepare Yeast
Ingredients
Directions
Prepare
Grate the potatoes into a large bowl.
Add the yeast and cold water to the bowl.
Rest and strain
Let the mixture stand for 12 hours.
Pour off the water and strain the thick part through a sieve.
The yeast is now ready for use.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
What each ingredient does
- Yeast
- Provides the microbes that ferment sugars and produce gas, so the mixture becomes active.
- Potatoes
- Supply starch and nutrients that feed the yeast during the standing period.
The step that matters
Let the mixture stand for 12 hours. Fermentation needs time for the yeast to multiply and become active. Stopping early yields a weak culture that may not leaven dough properly.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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